In many years of testing various barrel lengths, I have found that the same powders that are good in one barrel length are also the best in others, at least in velocity.
I don't know if the powders I tried are "the best." The main point was to try newer powders and see what happened. These often are an improvement, though often in not in mere velocity, the basic standard of most handloaders. So I loked over the loading manuals and tested what looked good.
I was indeed using Weatherby cases, and the Vanguard apparently (I checked with a bore-scope) has the same freebore as the Mark V. I have no idea why Norma data was so warm in my rifle, but it is another excellent example of why it's smart to start low. I might have used a different bullet than the Norma data, in fact I am almost certain that I did, which might be part of it.
